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LiAlO2:Fe3+荧光体微波辐射法合成及其发光性能

Synthesis of LiAlO2: Fe3+ Phosphors by Using Microwave Irradiate Method and Its Luminescent Properties

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【作者】 李沅英范文昌何汉波谢驭洲

【Author】 Li Yuanying Fan Wenchang He Hanbo Xie Yuzhou(Zhongshan University) (Guangzhou Research Institute of Nonferrous Metals)

【机构】 中山大学化学系广州有色金属研究院

【摘要】 本文用微波辐射法合成了LiAlO2:Fe3+荧光体,X-射线粉末衍射分析确证为四方晶系,晶胞参数a=o.5171nm,c=o.6269nm,荧光体的最大激发峰λex=251.0nm,最大发射峰λem=734.5nm,在254nm光激发下,色坐标值X=0.435,Y=0.236,用JWY激光微粒度分析仪测定了荧光体的颗粒直径和颗粒度分布D50=6.32μm,D75=8.47μm,和D25=4.42μm.研究了不同助熔剂、Fe3+离子掺杂量和碱金属Li、Na或K与Al的原子比对发光强度的影响.

【Abstract】 Synthesis of LiAlO2 : Fe3+ phosphors in powder form has been achieved by the microwave irradiate method. Its structure is determined as a kind of tetragonal system by X -ray powder diffraction. Its lattice parameters a = 0.5171nm, c = 0.6269nm. The phosphors has the maximum excitation spectra peaks at λex = 251.0nm and the maximum emission spectra peaks at λem=734.5nm. Under 254nm excitation , its colour coordinates are x = 0.435, y =0.236 respectively. The phosphors particle size and its distribution are measured by JWY laser particle size analyzer with D50 =6.32/μm, D75 = 8.47/μm and D25=4.42/μm respectively. The effects of different flux, Fe3+ ions dosage, ratio of atoms (Li to Al and alkali metals M= Li, Na or K to Al) on luminescent intensity are examined.

【基金】 广州市科技计划项目资助
  • 【文献出处】 广州化工 ,Guang Zhou Chemical Industry and Technology , 编辑部邮箱 ,1997年01期
  • 【分类号】O753
  • 【被引频次】5
  • 【下载频次】69
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